Title: Some remarks on singular capillary cones with free boundary
Abstract: We discuss the existence of minimizing singular cones with free boundary associated
to the capillarity problem.
Precisely, we provide a stability criterion à la Jerison-Savin for capillary hypersurfaces and show that, in dimensions up to 4, minimizing cones with non-sign-changing mean curvature
are flat.
We apply this criterion to minimizing capillary drops and, additionally, establish the instability of non-trivial axially symmetric cones in dimensions up to 6. The main results are based
on a Simons-type inequality for a class of convex, homogeneous, symmetric functions of the principal curvatures, combined with a boundary condition specific to the capillary setting.
This is based on a joint work with A. Pacati (ETHz) and B. Velichkov (UniPi).